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- W2370362078 abstract "A soil culture experiment was conducted:taking calcium fertilizer at variable values,the changes of the available calcium in soil were studied through application of different kinds of calcium fertilizers in yellow mud field by room temperature cultivation.The results indicated that application of different kinds of calcium fertilizers in yellow mud field influenced the available calcium of soil,the speed at which fertilizers released available calcium was in the order:lime nitratecalcium hydroxide=calcium phosphate primarycalcium magnesium phosphate dolomite dust.In the pot experiment,taking calcium at variable values,eight treatments which had four repeats were designed to study the effects of soil available calcium on N,P and K content and uptake of flue-cured tobacco in a completely randomized design.The results indicated that with the increase of application of calcium fertilizers,the N content,P content and their uptakes of tobacco-leaf decreased gradually;the N content and uptake of Ca8 treatment dropped by 24.17% and 17.47% respectively in contrast with Ca1 treatment;the P content and uptake of Ca7 treatment dropped by 38.46% and 29.62% respectively in contrast with Ca1 treatment.The K content and its uptake of tobacco-leaf increased first and decreased later,the K content of tobacco-leaf with Ca3 treatment reached the peak value,the K uptake of tobacco-leaf with Ca6 treatment reached the peak value,which increased by 13.99% and 23.69% in contrast with Ca1 treatment.The N,P and K contents and their uptakes of tobacco-root and tobacco-stem had the similar regular pattern to the K content of tobacco-leaf.The whole tobacco plant N uptake decreased gradually,that of minimum Ca8 treatment dropped by 22.64% in contrast with Ca1 treatment.The whole tobacco plant P and K uptakes increased first and decreased later,those of Ca3 treatment increased by 6.17% and 17.84% in contrast with Ca1 treatment." @default.
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- W2370362078 date "2012-01-01" @default.
- W2370362078 modified "2023-09-26" @default.
- W2370362078 title "Effect of Soil Available Calcium on N,P,K Contents and Uptake of Flue-cured Tobacco" @default.
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